#include <stdio.h>
void main()
{
    int p,q,r,s,count=0;
    printf("The 4 fractions which sum is equal 1 are :\n");
    for(p=2;p<5;p++)
        for(q=p;q<7;q++)
            for(r=q;r<13;r++)
            if(p*q*r-q*r-p*r-p*q != 0){
                s=(p*q*r)/(p*q*r-q*r-p*r-p*q);
                if(!((p*q*r)%(p*q*r-q*r-p*r-p*q))&& s>=r)
                printf("[%2d]1/%d+1/%d+1/%d+1/%d=1\n",++count,p,q,r,s);
            }
}
